Gustav eabee



(No Model.)

Gr. BADER.

UNDERGROUND CONDUIT. FOR ELECTRIC WIRES. N0. 369,813. PatentedSept. 13, 1887.

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GUSTAV BADER, OF NEW YORK, N. Y. i

UNDERGRUND CONDUIT FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent No. 369,813, dated September 13, 1887.

' Application filed May 11, 1887. Serial No. $137,806. (No model.)

To all whom, it may concern:

Be it known that I, GUsTliv BADER, of the city, county, and State of New York, have invented certain new and useful Improvements in Underground Conductors for Electric' Wires, of which the following is a specification.

This invention relates to an improved underground conduit for electric wires in which a number of longitudinal ducts for the cables containing the electric wires are arranged and the sections of which can be accurately centered and connected; and the invention consists of au underground conduit for electric wires which is provided with a series of larger longitudinal openings for the electric wires and intermediately between the same, with a number of smaller longitudinal openings which serve for the insertion of connecting-pieces at the ends of the conduit'sections, so as to properly center the ends. Each section of underground conduit is provided at one end with a socket that fits over the spigot end of the adjoining section by a filling of cement.

In the accompanying drawings, Figure 1 represents an end elevation of my improved underground conduit for electric wires. Fig. 2-is an elevation of the opposite end of the same. Fig. 3 is a vertical longitudinal section showing thejoint between two adjoining conduit-sections.

Similar letters of reference indicate eorresponding parts.

A A in the drawings represent two adjoining sections of my improved underground conduit for electric wires. The sections A A are preferably made of pipe-clayin a suitable mold and provided with a number oflongitudinal openings, c a, preferably of round shape, through which the electric wires are passed in the form of cables or otherwise and intermediately between the openings a, with smaller longitudinal'openings b, preferably of square shape.

The conduits A A are preferably rnade of oblong cross-section, channeled at the outside and rounded o at the corners, so that each individual longitudinal duct c has a wall of uniform thickness, as shown in Fig. 1. This not only reduces the weight of the conduit, but permits of the more uniform burning of the same in the kiln. The smaller openingsb serve for inserting square pieces d d of wood or other suitable material, to form a reliable joint between two adjoining conduit-sections, A A, as shown in dotted lines in Fig. 3. The connecting-pieces d d produce the accurate centering of the sections. Each section is provided at one end with a flange or socket, e, into which the opposite plain or spigot end is inserted, so as to form a joint between the conduit-sections. The space formed between the longitudinal side channels of the sections and the wall of the socket e is filled up with a suitable cement, as shown in Fig. 3.

In this manner an underground conduit for electric wires is obtained which can be made in molds like clay pipes, and which has a large numberl of longitudinal ducts for the electricwires, and which Vis'accurately centered and jointed by the connecting-pieces extending into the spigot and socket ends of two adjoining conduit-sections.

Having thus described my invention, I claim as new and desire to secure by 'Letters Patent- 1. An underground conduit for electric wiresprovided with a series of longitudinal ducts and a second series of smaller longitudi nal openings arranged intermediately between the first longitudinal ducts. said conduits hav ing rounded-oli' ends and longitudinal channels at the sides, so as to provide a unform thickness of material in the Walls surrounding the individual ducts, substantially as set forth.

2. The combination of two adjacent sections of underground conduits, each being provided with a series of larger longitudinal ducts andl a series oi' smaller intermediate openings with short connecting -pieces inserted into the smaller openings to some distance from their ends for connecting` and centering the adjoining ends of the conduit-sections, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

GUSTAV BADER.

Witnesses:

PAUL GoEPEL, SIDNEY MANN. 

